Compressor.



Patented Feb. I8, 1919.

2 SI'IEETS-SIIEET l.

wN MM H. ROLKERR. COMPRESSOR.

l 4APPLICATION FILED IAN. 4. |918.

Patented Feb. 1s, 1919.l

2 SHEETS-SHEET 2.

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ments with which nnTLoW nonnina, or oAxLANn, CALIFORNIA;

CDMPRESSOB. l

Specification of Letters Patent;

Patented Fee. 1s. 1919.

Application filed January 4, 1918. Serial No. 210,812. To ail whom t may concern:

lBe it known that I, Rn'rnow ROLKEER, a citizen of the United States, and a resident of Uakland, in the county of Alameda and State of California, have invented a new.

and llm'proved Compressor, of which the following is a full, clear, and exact description'.

Among the lprincipal objects which Athe presentinvention has in view are: to increase the power of compression in a mal chine' of thecharacter mentioned incorresponden-ce with the increment of the resistance of the fluid being treated; to radiate the heat incident to compression; to minimize the degree of movement of the worMng parts of the machine; to avoid vibration in the machine; and to reduce friction on the Dra/wings.

`Figure 1 isa longitudinal vertical section of a compressor constructed and arranged in accordance with the present invention;

Fig. 2 is a vertical cross section .of the same, the section being taken as @n the line 2-2 in Fig. 1; l

Fig. 3 is a section of the same, the section being taken as on the line 33in Fig. 1;

- Fig. Zlis a cross section of the machine, the section being taken as on the line A-Jl in Fig. 1;

Fig. 5 is a detail view on a reduced scale,

showlng one ofthe spiral compressor elethe compressor 1s furnished. i

Dcacriptz'oa.

As seen in the drawings a compressor when constructed in accordance 'with the present invention, has hollow cone-shaped drums and 11, and the drum 11- in service is held within the drum 10. The drums are disposed in eccentric relation to each other and are independently rotatively mounted, the axes Aof rotation of the two drums being parallel. 'llhe drum 1-1 is completely inclosed within the drum 10, the said drum 10 being provided with a face plate 12 for this purpose. The face plate 12 has a tulou lar shaft centrally arranged and having en tensions 13 and 111. The extension 141 has keyed thereon a driven gear wheel 15. 'lhe hub of the gear wheel 15 is utilized to form a portion of the race for the bearing balls `the balls 16 is formed in the 16. The companion portion of the race for hub 17 of a supporting standard 18.

rllhe head 17 is hollow to form a chamber'` V19, wherein a ball-bearin race block 20 is supportedto form a frictlon-reducing bearing4 withthel race block 21, which is keyed to the shaft 22 rigidly attached to or integrally formed with the drum 11. The race'blocks 20 and 21 are tightened'or relieved on the .balls 23 by a crown block' 24 and the hand-operated screw 25.A 4By judicious use of shims, the blocks 20 and 21 and shaft 22 may be raised or lowered for truing the shaft 22 with the axis of the drum 10, and of the shaft 26 and that formed by the sections 13 and 14 at opposite ends of the drum 10.

When truing the shaft 22 at one end of the drum 11, a similar operation is performed for the shaft 27 'at the opposite end. The shaft 27 has rigidly mounted thereon a race block 28 for the balls 29 which rest in the companion raceblock 30. The

race block 30 is supported in a ring 31 in a chamber 32, which corresponds with the chamber 19 atv the op-posite end of the compressor. rlihe blocks 28 and 30 and the shaft 27 supported thereby are primed or trued as to their operating position by the screw 33.

The shafts 22 and 27 are trued until at one point the outer surface of the drum 11 .is separated from the inner surface of the cev drum I10 a distance equal to the thickness of the two tapered spiral coils '3d and 35. Fach of the coils 34 and 35 is shaped substantially as shown in Fig. 5 of the drawings, the convolutions of the said coils being spaced to receiveV snugly therebetween the convolntions of the companion coil. As shown in Fig. 1, the result of this arrangement is that on a central plane, the passage between the two drums is completely and hermetically sealed. As shown in said Fig. 1, the coil 31 completely fills and conforms to the shape of the inner surface of the wall of the drum 10, while the coil 35 corresponds with the shape and'size'of the drum 11. The coils 3d and 35are preferably constructed from resilient material and are so set that'l they lightly press each the Vdrum with wnhich Tt corresponds. That is to say, thecoil 3nd 1s set to slightly expand to maintainoa light but constant outward pressure against the li-o fri?

-inner wall of the drum l, while the coil is set to slightly contract, to 'bear lightly on the outer surface of the drum 11. A

As a result of this construction, there eX- tends around the drums, aseriesof spirally shaped chambers 36 and 37. Said chambers are diminished in width and diameter in correspondence with'the convolutions of said coils, and air or other fluid introduced thereto from the chamber 38 adjacent the face plate 12, is delivered therefrom to the cham-v er 39 at the diminished or contracted ends of the two drums. By reference to Fi 1,

the progressive contraction of the chainl ers 3G and 37 may be seen. x

When `it is understood that theadiameter 'of the chambers 37 are contracted in correspondence with the coils, such as shown in Fig. 5, it will-be seen that the cubic'contents of the receiving or first of the series of chambers is much 'greater than the cubic contents of the delivering or last chambers adjacent the delivery chamber 39. As the samemass of air or uid received in the receiving chambers is contained in the last of the chambers 37 the4 mass is reduced by being greatly compressed. a For the perfect working of the compressor, it is necessary that the coils 34 and/ 35 should be maintained in their proper rel-a-- tion. '.l`o this end, the -coils ,are furnished with pins 40 and 41. The pins 40 and 41 vare laterally extended to engage gear-like serrations 42 and 43, 44 and 45, respectively. The serrations 42 are cut onthe inner' edge `of a 'followi ring 46. The serrations 43 are extended om the edge of the lower end ofthe drum 11. -The serrations 44 are internally extended from the drum 10 at the lower end thereof, while the serrations 45 are cut or formed on the smaller end of the drum 11. rEhe pins 40 and 41 are placed between the sei-rations, as shown best in Fig. 2

'of the drawings. This attachment while not interfering with the expansion and contraction of the coils, prevents the creepv of thecoil due to any consequent friction whichl might develop on the drums 10 and 11.

j sa

-To synchronize the movement of the two drums and accommodate'the eccentric ar- .rangement thereof,the drums are operay connectedby dowels 47. The dowels tive 47 are extended through perforationsin a vface plate 48. Theplate'48 is furnished with a series of air passages '49, which establish communication between the tubular assage through the extensions 13 .and `14'0f t e sup.- portmg shaft of the drum 10. The chamber l50 inside thev drum 1v1-and the. chamber 38 which communicates with the chambers 36 andl 37, L A hub 51 is formed on the plate 48, having a contracted bearing ed e, which has a bearing surface on the-face-p ate 12 Ato rovide for the relative movement'of the rums 10 and 11,v or of the drum 11 on the face plate 12.. The movement` of the two drums above referred to corresponds with the maximum separation of the coils 34 and 35 from the drums 11 and 10, respectively. Also the movement of the two drums corresponds with the offset of the axes of the dowels 47, and the dowel pins 52 thereof. The dowels 47 as seen best in Fig. 2 of the drawings, are operatively connected by a floating ring 53. The ring 53 is pivotally connected with the dowels by means of offset pins 54. The result of this connection is that asthe drum 10 and face plate 12 thereof are rotated about their center, the drum 11 is correspondingly rotated about its center, while the connecting elements, to wit, the dowels 47, gyrateabout the center of the pins 52 with a planetary movement. In thisrmanner, the axial relation between the drums 10 and 11 is maintained constant, while said drums rotate carrying therewith the coils 34 and 35,.the progressive sections of which are alternately contracted and expanded progressively, with the result that the air or' other iuid trapped thereby is gradually Vmoved from the receiving end of each coil or of the chambers 37 and 36 thereof toward the delivery end or to the chamber 39, to be delivered thence by way of the delivery pipe 55.

From the foregoing, it will be .understood that if air is introduced at the inlet pipe 56,

it is delivered from the pipe 55-at a pressure` e corresponding with the reduction in volume of said air. l

Claims.

1. A compressor comiprising a plurality of helical members of di erent diameters, the

convolutions whereof are interleaved; an

means for maintaining the convolutions in from the enlarged end of said chamber to the contracted end thereof.

, 3. A compressor comprising a conical member .forming a compression chamber, the

walls whereof are spaced a art a helical member disposed between saild walls to form a helical space between the walls of said chamber; means for interrupting said space for forming non-communicating helical sector-chambers, said means embodying a secinterleaved relation to the first-mentioned the'w allswhereof are spaced apart; a heli-- y call member disposed circumfolded conical ond helical member-Ieccent'ricallyA disposed in members correspondingly.

4;. A compressor comprlslng a conlcal member. forming a compresslon chamber,

member; and means for rotating said helical between said walls to form a helical space between the walls of said chamber; means for interrupting said space for forming non-communicating helical sector chambers, said means-embodying a second 'helical member eccentrically disposed in interleaved relationv to the firstmentioned member; and means for rotating' said helical members 'correspondingly for maintaining the bodies of said members alined on the plane of coincidence of the 4 helices.

5. A' compressor comprising a plurality of drums of different diameters; mountings for said drums arranged drums in eccentric drums.

ameters; mountings for said drums arranged` to hold the axes of said drums` in eccentric parallel relation; a plurality of circumfolded helical coils, each of said coils being itted to one of said drums; means operative necting; each of said which `it is fitted; and means for rotating said drums and coils connected therewith in correspondence for synchronizing the movement of said coils on the line where both coils engage both drums.'

7. A compressor comprising a lurality of circumfoldedv conical drums of 'ilerent diameters; mountings. forl said drums ar ranged to'hold the axes of said drums in eccentric arallel relation; a plurality of circumfolded helical coils, each Aof said coils dlmensionvof the body of said coils' being between said drums on the plane of closest approximation thereof; means operatively connectin to which 1t is fitted; and meansoperatively connecting said drums and coils for synchronizing the movement of said drums and coils on the plane of the juxtaposition of the said drums where said coils form a complete laminated wall lengthwise Ibetween saidl vnarrow ROLKERR.

being fitted to one of said drums, the radial each of said coils to the drum y concoils to the drum to 51! equal and corresponding with the separation- 

